Teledyne 2002 instruction manual Communications Option Board, 6.1.RS-232-EInterface Specifications

6. Communications Option Board

Both RS-232 and RS-485 communication interface boards are available as an option for the Model 2002. The communication option boards allow data to be output to a host computer with the appropriate interface. Connection to the RS-232 or RS-485 communication interface boards are via a 9 pin D-subminiature female connector.

6.1.RS-232-E Interface Specifications

Format	EIA standard RS-232-E, full-duplex, no handshaking, asynchronous
Data Rate	9600 baud
Character Length	Eight data bits
Parity	No parity
Stop bits	One stop bit

A common application of the RS232 version of the HPM-2002, is to connect the pressure gauge directly to the serial port of a PC. This is done by first wiring a communication cable in the manner shown below.

PIN	MNEMONIC	SIGNAL	DESCRIPTION
2	TX	Transmit Data	Transmits data within RS-232-E voltage levels
3	RX	Receive Data	Accepts data within RS-232-E voltage levels
5	SG	Signal Ground	Establishes the common ground reference
			potential for all interchange circuits
when			Communicating via RS-232-e
232-E.
			Host computer ready to accept data.
4	CTS	Clear to Send	(Reserved for future use, not implemented
			by present software.
8	RDY	Ready	Ready to receive data (always high,
			not implemented by present software).

Model 2002 Vacuum Gauge Page 22 of 37